Fix build on OpenBSD: 'fix for older autotools that don't define "abs…

…_top_YYY" by default'. Patch by Benoit Chesneau. Closes COUCHDB-152

git-svn-id: https://svn.apache.org/repos/asf/incubator/couchdb/trunk@710027 13f79535-47bb-0310-9956-ffa450edef68

configure.ac

@@ -240,6 +240,10 @@ AC_SUBST([locallibbindir], [${locallibdir}/bin])
 AC_SUBST([localerlangbindir], [${locallibdir}/erlang/bin])
 AC_SUBST([localerlanglibdir], [${locallibdir}/erlang/lib])
 
+# fix for older autotools that don't define "abs_top_YYY" by default
+AC_SUBST(abs_top_srcdir)
+AC_SUBST(abs_top_builddir)
+
 AC_REVISION([LOCAL_VERSION])
 
 AC_CONFIG_FILES([Makefile])